The independent variables: demineralized whey powder (0.0; 1.5 e 3.0 %), lactic culture (1.0; 2.0 e 3.0 %) and mix treatment temperature (85; 90 e 95°C) were studied on the responses sensorial and instrumental consistencies. Response surface methodology was used to make statistical treatment of the experiments and to develop mathematical models of the relationship between the variables and the responses. Instrumental and sensorial consistency showed similar results and correlation between itself, r=0.65 (p < 0.01), both were higher when a mix treatment temperature was increased and amount of demineralized whey powder was decreased.
yogurt; consistency and demineralized whey powder
